End bracket for dynamo-electric machines



Aug. 27, 1929. E. E. DREEsE ET AL 1,725,784

END BRACKET FOR DYNAMO ELECTRIC MACHINES Filed July 29, 1927 By Jil/fam aV/gna 2 4 A L ATToRNEYs.

CII

Patented Aug. 27, 1929.

UNITED STATES PATENT OFFICE.

ERWIN E. DREESE, OF EUCLID VILLAGE, AND WILLIAM LAVIGNA, OF UNIVERSITY HEIGHTS, OHIO, ASSIGNORS T0 THE LINCOLN ELECTRIC COMPANY, OF CLEVE- LAND, OHIO, A CORPORATION OF OHIO.

END BRACKET FOR DYNAMO-ELECTRIC MACHINES.

Application led Iuly 29, 1927.

In a co-pending application of Villiam Lavigna, one of the applicants herein, filed June 23, 1927, Serial No. 200,842, a novel construction of end bracket for dynamo electric machines is disclosed and claimed, such construction being characterized by the substitution for the cast iron bracket, heretofore customarily employed in this connection, of a bracket fabricated out of structural steel shapes. Specifically such improved bracket comprises a central cylindrical steel portion that forms the bearing box for the shaft or spindle of the machine, a bracket ring of structural steelstock made from an elongated structural steel member formed into a circle and having its ends Welded together, and buttress-legs welded to such box and bracket ring.

'Fhe present improvements relate more particularly to a fabricated end bracket of the type in question in which the bearing box is likewise assembled from structural steel members. Still more particularly the present improvements relate to an end bracket with a bearing box adapted to receive a socalled split bearing. Incidentally certain modifications in the structure of the end bracket itself are involved.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims, the annexed drawing and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the inventionmay be used.

In sad annexed drawing Fig. l is a front elevation of our present improvement end bracket and bearing box, the front Wall of the latter being removed in order better' to show the interior construction of such box; Fig. 2 is a broken central section thereof taken on the vertical plane indicated by the line 2 2, Fig. l; Fig. 3 is a rear elevation of the box by itself; Fig. 4 is a plan view of the lower portion of said box; Fig. 5 is a central vertical section of such lower portion, the plane of the section being indicated by the line 5-5, Fig. 4; Fig. 6 is a plan view of the upper portion of the box; Fig. 7 is a central vertical section there- Serial N o. 209,213.

of taken on the plane indicated by the line 7-7, Fig. 6; Fig. 8 is an end view of such upper box portion; and Fig. 9 is a broken plan View of an assembly detail, the parts shown lying partly in the plane indicated by the line 9-9, Fig. l.

The principal element or base of the end bracket is a ring made up of two parts l and 2, the former being somewhat less and the latter somewhat greater than a semi-circle in extent. In other words, the ring is cut in two on each side in the plane defined by the line 9-9, Fig. l. This ring, as in the case of the continuous ring constituting the end bracket in the aforesaid co-pending application, is formed of structural steel stock, specifically from angle bar stock, suitable lengths hereof being cut and beveled at their ends so that upon bending the pieces into the approximately semi-circular form just described and then bringing the ends of the two pieces into abutment, a complete ring shaped piece is had. However, in the present construction the abutting ends are not welded together, but the upper section 1 of the ring is separable from the lower section 2, as will be presently set forth in detail. The resulting ring (see Figs. 2 and 9) presents the form of a centrally directed flange 3 and a peripheral cylindrical portion 4, the edge of the latter being rabbeted to fit a complementary rabbet on the stator end ring 5 that forms a part of the main frame of the machine.

The bearing box, which is located approximately centrally with respect to the aforesaid ring, comprises a main portion 6 and a supplemental portion 7, both of general rectangular shape and each being formed out of pieces of structural steel stock, i. e., angle bar or channel stock cut to the proper length. Thus, such portion 6 of the box, as best shown in Fig. l, is formed of two 9 similar pieces of angle bar stock 6, brought together with the edges of two flanges in abutting relation and the seam along such edges completed by welding, as for example by an arc pencil or a carbon arc into which a pencil of weldinr metal is introduced. The portion 7 which is not as deep as the main portion 6, may be similarly formed by welding two pieces of angle bar stock together, but is more conveniently made out the bearing.

of a single piece of channel bar stock as shown. llfhile such portion 7 is shallower than portion 6, it is of the same width and the edges ofV the channel bar section composing the former are brought into abutting relation with the adjacent edges of the lateral upst-anding flanges of angle bar sections G and the seam along such edges welded as before, so that the upper surfaces of the two component sections 6 and 7 willlie m 'the same plane. A plate 8 is welded to the -trout tace of box portion 6, such plate having a semi-circularV opening 8a in its Vupper edge, and a second plate 9 to the rear portion thereofbelow box portion 7 so as to form a receptacle in the main portion of the box lifor oil or other lubricant.

A common closure 10 for the two portions 6 and 7 comprising the box is formed out or a section of channel bar stock, as shown in Fig. 1, the front end of the cover thus p'rovided'being closed by a plate 11 having a semi-circular opening 11et therein complementary to that in plate 8. rlhe lower edges of the depending iianges of cover member 10 of the box are preferably rabbeted so as to they rest on the upstanding langes of the box portions 6 and 7.

n order to secure the bearing proper in the box, two similar transversely extending seating 'members 16 adapted to receive and support the lower halt 12 of Vsuch bearing are welded at their respective ends to the side walls of portions 6 and 7 of the box, and the'box 'cover V10 Vis similarly provided with centrally located seats 18 adapted to receive the upper halr" of such bearing. A cap screw 2() serves to clamp the two halves of the bearing together, while a set screw 19 prevents t-he bearing from turning in the seat thus provided. Said box cover 10 is detachably Vsecured to the box by means of set bolts 20 passing therethrough and having threaded engagement in one of said members 16. The rear end of box portion 7 is provided with a plate 21, having a central opening that is grooved to receive an oil retaining ring, as will be readilyunderstood.

The buttress-legs 22 are .preferably spaced as shown, i. e., two are disposed in a transverse diametra-l plane, the other depending downwardly so as to give free access tothe upper portion of theY bearing box and more particularly to permit the free removal of the box cover 10 with the upper halt1 17 of It is in order, to give still more ready access to thebearing, that the upper portion 1 of the ring that forms the base of the bracket structure is made in a separate piece from the lower portion 2: ot such ring. ln order to detchably secure the Lipper portion to the lower portion, inwardly directed angular lugs 23 are welded to the form a tight iitting joint wherev front face of such ring portion 1 adjacent its respective ends and set bolts 24C, passing through the horizontal portions of such lugs, serve fixedly to attach the same and thus the ring portion to the horizontal tlanges 25 of the respective.transversely disposed buttress-legs 22.

Other modes of applying the principle of our invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent otl such stated means be employer.

Ve therefore particularly point out and distinctly claim as our invention 1. ln an end-bracket for a dynamo-electric or like machine, the combination of a ring member made from structural steel, a split bearing box, and buttress legs welded at their respective ends to said ring member and one section of said box, the sections of the latter being made of pieces of structural steel.

2. In an end-bracket for a dynamo-electric or like machine, the combination of a segmental ring member made from structural steel, a split bearing box, and buttress legs welded at their respective ends to said ring member and the lower section of saidbox, said section being made of pieces of structural steel welded together to form one portion of greater depth than the other.

3. In an end-bracket for a dynamo-electric or like machine, the combination of a segmental ring member made from structural steel, a split bearing box, yand buttress legs welded at their respective ends to said ring member and the lower sectionof said box, said section being made of pieces of structural steel welded together to form one portion or" greater depth than the other, and the upper section of said box being detachable from such lower section and' likewise made ot a piece of structural steel. Y Y

4j ln an end-bracket for a dynamo-electric or like machine, the combination of a segmental ring member made from structural steel, a split bearing box, andbuttresslegs welded at their respective ends to said ring member and 4one section of said box, the sections of the latter being made of approximately rectangular pieces of angular steel stock and plates welded together.

5. In an end-bracket for a dynamo-electric or like machine, the combination of, a segmental ring member made from lstructural steel, a split bearing box, and buttress legs welded at their respective ends to said ring member and one section of said box, the sections of the latter being made of approximately rectangular pieces of steel channel stock and plates welded together.

6. In an end-bracket for a dynamo-electric or like machine, the combination of a segmental ring member made from structural steel, a split bearing box, and buttress legs welded at their respective ends to said ring member and the lower section of said box, said section being made of two pieces of steel channel stock having flanges of different depths welded end to end with the edges of such flanges in alignment and plates welded to the exposed ends of said pieces.

7. In an end-bracket `for a dynamo-electric or like machine, the combination of a segmental ring member made from structural steel, a split bearing box, and buttress legs welded at their respective ends to said ring member and the lower section of said box, said section being made of two pieces of steel channel stock having flanges of different depths welded end to end with the edges of such flanges in alignment and plates welded to the exposed ends of said pieces and the upper section of said box being detachable from such lower section and made from a single piece of steel channel stock.

S. In an end-bracket for dynamo-electric and like machines, the combination of a 'ring comprising two segmental members each made from a piece of structural steel and detachably secured together at their corresponding ends, a split bearing box, and buttress legs welded at their respective ends to one of said ring members and one section of said box.

9. In an end-bracket for dynamo-electric and like machines, the combination of a ring comprising two segmental members' each made from a piece of steel angle bar stock properly circled with one flange of the bar constituting a cylindrical portion and the other a flat inwardly directed portion, a split bearing box, and buttress legs welded at their respective ends to one of said ring members and one section of said box.

l0. In an end-bracket for dynamo-electric or like machine, the combination of a ring comprising two segmental members detachably secured together, a split bearing box, and buttress legs welded at their respective ends to one of said ring members and one section of said box.

Signed by us this 25th day of July, 1927.

ERVIN E. DREESE. VILLIAM LAVIGNA. 

